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Sun, 16 Aug 2026 05:52:12 +0000 Date: Sun, 16 Aug 2026 13:52:04 +0800 From: Philip Li To: Steven Rostedt CC: kernel test robot , LKML , Linux Trace Kernel , , Masami Hiramatsu , Mathieu Desnoyers , Markus Elfring Subject: Re: [PATCH] tracing: Cleanup event_enable_trigger_parse() by using __free() Message-ID: References: <20260701174829.67ab8a33@gandalf.local.home> <202608050839.Ip5dU0Jz-lkp@intel.com> <20260806131314.771bfaea@gandalf.local.home> Content-Type: text/plain; charset="iso-8859-1" Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20260806131314.771bfaea@gandalf.local.home> X-ClientProxiedBy: SI2PR02CA0036.apcprd02.prod.outlook.com (2603:1096:4:195::15) To SJ0PR11MB5214.namprd11.prod.outlook.com (2603:10b6:a03:2df::22) Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ0PR11MB5214:EE_|PH7PR11MB7550:EE_ X-MS-Office365-Filtering-Correlation-Id: 655868b2-a080-4252-fa7e-08defb5a8451 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|23010399003|376014|1800799024|366016|6133799003|10067099003|4143699003|11063799006|56012099006|22082099003|18002099003; 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Hi Steve, sorry about this meaningless report, we will improve the bot to check new patches to avoid sending such report. > Sashiko discovered this issue and I made a v2 with a fix a week ago: > > https://lore.kernel.org/all/20260727155459.202af38d@gandalf.local.home/ > > -- Steve > > > On Wed, 5 Aug 2026 08:21:33 +0200 > kernel test robot wrote: > > > Hi Steven, > > > > kernel test robot noticed the following build warnings: > > > > [auto build test WARNING on trace/for-next] > > [also build test WARNING on linus/master v7.2-rc6 next-20260804] > > [If your patch is applied to the wrong git tree, kindly drop us a note. > > And when submitting patch, we suggest to use '--base' as documented in > > https://git-scm.com/docs/git-format-patch#_base_tree_information] > > > > url: https://github.com/intel-lab-lkp/linux/commits/Steven-Rostedt/tracing-Cleanup-event_enable_trigger_parse-by-using-__free/20260805-073956 > > base: https://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace for-next > > patch link: https://lore.kernel.org/r/20260701174829.67ab8a33%40gandalf.local.home > > patch subject: [PATCH] tracing: Cleanup event_enable_trigger_parse() by using __free() > > config: s390-allnoconfig-bpf (https://download.01.org/0day-ci/archive/20260805/202608050839.Ip5dU0Jz-lkp@intel.com/config) > > compiler: s390x-linux-gnu-gcc (Debian 14.2.0-19) 14.2.0 > > reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260805/202608050839.Ip5dU0Jz-lkp@intel.com/reproduce) > > > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > > the same patch/commit), kindly add following tags > > | Reported-by: kernel test robot > > | Closes: https://lore.kernel.org/oe-kbuild-all/202608050839.Ip5dU0Jz-lkp@intel.com/ > > > > All warnings (new ones prefixed by >>): > > > > In file included from ./include/linux/file.h:13, > > from ./include/linux/kernel_read_file.h:5, > > from ./include/linux/security.h:26, > > from kernel/trace/trace_events_trigger.c:8: > > kernel/trace/trace_events_trigger.c: In function 'event_enable_trigger_parse': > > >> ./include/linux/cleanup.h:228:22: warning: ignoring return value of '__must_check_fn' declared with attribute 'warn_unused_result' [-Wunused-result] > > 228 | ((typeof(p)) __must_check_fn((__force const volatile void *)__get_and_null(p, NULL))) > > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > kernel/trace/trace_events_trigger.c:1842:9: note: in expansion of macro 'no_free_ptr' > > 1842 | no_free_ptr(enable_data); > > | ^~~~~~~~~~~ > > > > > > vim +228 ./include/linux/cleanup.h > > > > 85be6d84244706 Peter Zijlstra 2023-08-15 226 > > 54da6a0924311c Peter Zijlstra 2023-05-26 227 #define no_free_ptr(p) \ > > 366fef794bd2b7 Ilpo Järvinen 2025-03-10 @228 ((typeof(p)) __must_check_fn((__force const volatile void *)__get_and_null(p, NULL))) > > 54da6a0924311c Peter Zijlstra 2023-05-26 229 > > > > -- > > 0-DAY CI Kernel Test Service > > https://github.com/intel/lkp-tests/wiki > >